Vent device



J. J. CATRON.

VENT DEVICE. APPLICATION FlLED JULY 28. 1919.

1,391,245. PatentedSept. 20,1921.

To" all'whem a mm citizen vof thefUnite'd S ates, residin 10. leaks in the hose-and to admit air into the ofi this tube ventsthe drain-hose. I y

The invention will be morereadily understood from a reading of the following speci- I fication and by reference to the accompanyi tom: acumen, or roman, 'rnxes.

J. owes, a p v V at Bonha'm, in thefc'ount'y or liannin and tate Be 'it known that I, JOHN of Texas, have invented certain new and useful Improvements in Vent Devices-of which theifollowim is a specification. i This invention re-ates to; newand useful improvements in hose devices fof gasolene.

dispensers to vent the hoseiand prevent air Where a tank's filled at e higherelevwticn than the bend in 'theidrain or. filling hose, an air lock is likely to, occur between the lowest in the hose the dispenser. In order to .overcome this trouble and also to obviate the use of admin-hose valve, em loy a small tube: for venting located between the cutoff" at the'dispenser and the connecting'end of thejliose and carry thi tube to; an elevation hi'her than the overflow of the measurin cyrnder er accu mul'ating cylinder; v I In. carrylng out the invention-small vent tube is" connected into the top of the elbow with which the drainhose is connected. The upper end of the tube beig t'apped'intethe top of the measuring cy inder above the overflow thereof. When-the supply is cut-' ing drawings, in which an example of-the invention is shown and wherein: F gure 1 is a view of theupper portion of a gasolene dispenser embodyingthe inven? tion and 'Fig. 2 is an'elevationof the supply and over-fiow connections. 7

Inthe drawings the numeral 1 designates a gasolene supply plpe which is connected'to V a two-Way T 2,,hav1ng its upper end connected with a measuring cylinder by a pipe 3. .From one of the branches of the 'T. 2,'a

' drain pipe 45 extends. The pipe 4 includes a drain valve 5 and connects with a main drain pipe 6. An overflow pipe 6". extends from within the measurin cylinder down to the pipe 6. From the ot er branch of the T 2, a discharge pipe 7 extends to a down-- turned elbow 8 and includes a cut-ofi-valve A drain hose 9 leads fr9 r n the lower end of the'elbow'8. v y I T geseleee ether liquid g g e g na specification of Letters Patent;

mane-d sepee'o, 1921.

f Appncairoe lifted July 2 8, 1919. Serial n 313, 22.

the measuring cylinder from pipe l through T 2 and." ipe 3, the valve 7' being normally closed.

from the cylinder flows outthrough pipe 3,;

T' 2, pipe 7 and valve 7 to elbow 8, from y opening the valve7' the liquid 7 which it isconveyed by the hose9to the point of discharge. The liquid is under air pressure as it enters the cylinder-, but this is cut olf and the liquid flows from thecylinder by gravity. When the valve 7 is opened and the hose is held so that a'bend is had,

a's in' filling tankspn trucks or at other high elevations, an airlock is likely to occur beitween the bend in the hose andvalve 7'; I.

use'the tube'*10 to'vent the air from the air lock which would otherwise have to pass. to

the: gasolene in the glass cylinder, causing the gasolene toiflow very sl'owlyvthrough the hose. Particular attention is called to'the -fact-, that the tube 10 has its bore'unobstructed sojthat the air may passth erethrough' op osite directions.

- y mprovement consists mainly in an'upi right vent tube. 10 having its lower endcon- 'necte'd in the top of elbow 8 andi'ts upper end passed through and tapped into the top llof the cylinder. The top of'the tube beingabove the top ofthe'ox erfiow pipe 6' can never be coveredbyithe liquid. When the valve 7 is cut off air may enterthe vent tube and the hose 9 and drain the hose. No drainhose-valve is necessary and a plain nozzle may be used as the air vent will cause the liquid to flow freely throughthe hose and drain therefrom. 7

When the hose 9has its discharge end elevated above the elbow 8, or when a vertical f bend occurs in the hose, a portion is formed vwhich is approximately U -shaped. If the valve 7 is partly opened, the gasolene may flow, through the hose 9 into this vertical U-shaped portion, and this gasolenernaynot completely fill the cross-sectional area of the hose. The vertical U-shaped portion of the hose becomes filled with the gasolene, without expelling the air within that portion of the hose between the 'U-shaped portion'and the elbow 8, whereby the air becomes en-, :trapped in this portion and forms an air lock. As the portion of the hose between the U-shaped portion and the elbow -8 begins tofill with gasolene, the air would ordinarily be forced back through the elbow, valv'e7,

and pipe 3,:and caused to travel upwardly through the gasolene. This would retard the flQWQQf the ge olene throughthese parts. 7 In my device, this cannot occur, as the air entrapped behind the U-shaped portion of thehose'will vent through tube 10 into the 'top of the cylinder 11. When the valve 7 is closed, and it is desired to'lowerthe hose and drain it,air passes inwardly through the tube and'enters the hose 9.

'What I claim, is:

1. In apparatus of the character described, the combination with an upstanding recep tacle having a bottom provided with a flange and an air space inits upper end, of a valve discharge fitting arranged beneath thebot-f tomand flange and leading from thebottom of the receptacle, a'vent pipe having a permanentlyopen boreso that air may pass therethrough in opposite i directions, said vent pipe being connectedwith the fitting at a point beneaththe bottom and rising therefrom and passing through the flange and having itsnpper intake endyleading into the air space in the top of the receptacle, and'a,

discharge conduit connected with the fitting. -2. In apparatus of the character described, the combination with an upstanding receptacle-having a bottom and an air space in its top, of a valve discharge fitting arranged beneath the bottom and covered thereby and leading into the receptacle, afvent pipe having a permanently open bore to permit of the passage of air therethrough.-in1opposite I directions, said pipe being connected-with the fitting adj acentvthe valveand at a point covered by the bottom and rising therefrom and having'its upper intake'end leading into the interior of the rece taele at the air space a discharge. conduit in the top thereof,v an connected with the .fitting;

thecombination with arecepta'clafof agrav 'ity discharge pipe; connectedjthere.-1V

3. apparatusjof the character described, 1

the combination with a receptacle, of a gravity liquid discharge pipe, having connection with the receptacle, a valve connected in said pipe, a drain hose connected withthepipe, and a tube connected with said pipe adjacent to said valve and leading into theup per portion of the receptacle, said tube hav-- Iingits borepermanently'open to permit of a the passage of air therethroughin op osi t directions, K V I In a p tus of. th character described,

with,avalve connected in said pipe, a drain hose connected with said pipe, anu pstari'd ing overflow pipe arrangedIwithin' the receptacle, and a tube connected 'with thegrav ity discharge pipe atv a point'near said valve and extndingupwardly above the'top of the overflow "pipe, 'saidtube' having a permanentlyopen boreto permitjof 'the;pas sage of air therethrough in" opposite'directions. i

' n '5. In apparatus bftiiehmcti described,

the combination with a recepta cle,'of agrav ity liquid discharge pipe having connection pipe, and aitubeconnected? with, said pipe near said valveand extending upwardly bet yond the maximum level of the "liquid with 7 V in the'said receptacle," said tubehavingjits' f bore permanentlyopen' to ,p ermitof the paslsage of air therethrou'gh: in opposite ,gdi'rectionsl V r In t estimonyf'wh-ereofll afiix m J 65 with the: receptacle a valvegconnected in said pipe, a drain hose connectedwith the 57;:

si ature. 75.

ATWQN, 1 

